Pattern plate with drawing attachment



I June 10 1924. p T 4 w. c; NORCROSS PATTERN PLATE W-ITH DRAWING.ATTACHMENT 1 Filed veal 2 1921 Sheets-Sheet 2 u T a 1 I I W. C. NORCROSSPATTERN PLATE WITH DRAWING ATTACHMENT Filed Dec. 2', 1921 I 3Sheets-Sheet 5 Y Mumm kllll ,7

"llllll Patented June 10, 1924.

earner onie WILLIAM C. NORCROSS, 0F TERRE HAUTE, INDIANA, ASSIGNOR'TOAMERICAN MOLD- y me MACHINE COMPANY, OF rnnnn HATITE, INDIANA, ACORPORATION OF IN- DIANA.

PATTERN PLATE WITH DRAWING ATTACHMENT.

Application filed December 2, 1921. Serial No. 519,419.

ToaZZ whom it may concern:

Be it known that 1, WILLIAM C. Nononoss, :a citizen of the UnitedStates, residing at Terre Haute, in the county of Vigo and State ofIndiana, have invented certain new and useful Improvements in PatternPlates with Drawing Attachments, of which the following is aspecification.

This invention relates vto a pattern plate provided with a drawingattachment for the purpose of drawing the pattern from a mold.

It has heretofore been proposed to pro- :vide pattern drawing-machineswhich are applied-to a molding flask, an instance of which is my PatentNo. 1,378,186 dated May 17 1921, but any present invention is distin-;guished by embodying drawing means or a drawing attachmentself-contained with, and bodily carried by, a pattern plate so that thesame plate which carries the pattern, is pro vided with its own meanswhereby it may be drawn.

The objects of the invention are, first, the provision of a drawingattachment or means self-contained with a pattern plate; :second,toprovide novel drawing means carried by the pattern plate adapted forconnection to the flask, whereby parallelism will be maintained betweenthe adjoiningsurfaces of the flask andpattern plate during :the drawingoperation, thus preventing any A tipping or tilting of the pattern.plate which "would tend to distort the mold, and insuring a perfectdraw.

[My invention comprises, first, a drawing attachment self-contained withthe pattern plate of a mold; second, guide posts having racks, andconnected gears or P11110115 meshing with the racks, the guide postsbeing adapted for attachment to the flask, whereby the rotation .of thegears insures an equal extent of movement of all parts of the patternplate in relation to the flask, and hence, parallelism as between theflask and pattern plate during the drawing operation; third, improvedconnections between the guide posts and the flask by which a rigid,self-adjusting connection is obtained and the guide posts are disposedin precise perpendioular relationship to the top of the flask; fourth,in the combination of the means and devices entering into my invention;fifth, in

in the plate 1.

the provision of other features and relationships of parts appearingmore fully hereinafter.

The disclosure in the-accompanying drawings, and whichgis hereinafterdescribed, "represents a practical embodimentof my .invention, but, asmodificationsmay'beresorted to without departing from the essentialprinciple thereof, such disclosure and description .are to be consideredas illustrative,'in stead of arestrictive, of the invention.

:In "the accompanying drawings: F gure 1 is :a'front elevation showingthe flask, and pattern plate provided with any invention, in position ona .jolting or joltramming ;machine, the flask appearing in .dottedlines. 1

Fig. 2 is an endelevation thereof.

peari ng in full ;lines and the pattern plate and pattern being raisedshowing how the pattern is drawn,.the flask and pattern plate. havingbeen first rocked over or inverted,

Fig. 4 is an end elevation of Fig.3;and Fig. 5 islan end elevation ofamodiflc'ation WllglFQlIl four guide posts and four .gearsare use Thepattern plate appears at 1, the patternat 2, the flask is shown at 3 anda jolt molding 01' j olt-ramming .machine is -Sl10W-11 COI1 ventially at4:.

I wish it .to be understood that it is not necessary to employ ajolt-ramming machine, as the eramnung of the mold may be carriedtransversely slotted asat 8 to receive transversely arranged rockersQwhich have arcshaped lower edges and oppositely extending partsprojecting beyond the sides of the:

posts 5 and received in cut out portions 10 The rockers 9 are looselypivoted on pins 11 tightly secured to :the posts 5. Consequently therockers canorock ,70 Fig. ,3 is a .frontelevation, the flask no or tiltand they thus provide a self-adjust ing connection between the posts 5and the top of flask 3 which prevents cramping of the guide posts in theevent that the joint of the flask is not true.

The ends of the posts 5 are tapered and project beyond the plate 1 asshown at 12, said ends constituting dowels or tenons which are providedwith slots 13 adapted to receive keys or wedges 14 at the proper time sothat when the keys or wedges are driven in position after the tenons 12are passed through the slots in the flange of the flask 8, the posts 5are rigidly connected to the flask. When thus connected, the selfadjustin rockers 9 insure that the posts 5 are abso utely perpendicularto the upper face-of the flask.

Journaled in suitable bearings 15 at the ends of a web or apron 16 onthe pattern plate 1, is a shaft 17 to which is secured two pinions 18meshing with the respective racks 6 of the guide posts 5. Thus, thepinions 18 are rigidly coupled together so that as the pattern plate 1is lifted during the drawing operation, (Fig. 3) the pinions 1S, hubs 7,and guide posts 5 will insure the maintenance of parallelism between theadjoining faces of the pattern plate 1 and flask 3. This action preventsany tilting or dipping of the pattern plate 1 and hence the patterncannot possibly distort the mold 3, Fig. 3, which has been formed and,as a. result, a substantially perfect draw will be effected.

The ends of the pattern plate 1 are provided with suitably formedflanges 19 having holes or sockets 20, 21, to receive removabletrunnions 22. The sockets or openings 20 are located at pointscorresponding to substantially the center of gravity of the flask,pattern plate and mold combined together. The sockets or openings 21 arelocated to correspond to substantially the center of gravity of thepattern plate alone.

In Fig. 1 the trunnions 22 are shown inserted in the sockets or openings20 so that the flask and pattern plate can be elevated by any suitablemeans connected to said trunnions without danger of accidentallyoverturning. After the flask and pattern plate have been rolled over andthe mold set down as shown in Fig. 3, the trunnions 22 are removed andinserted in the sockets or openings 21 for the purpose of attachment tosaid trunnions of any suitable drawing means so that the pattern may bedrawn from the figures." Two shafts17 instead-of oneshaft,

mold as shown in Fig. 3.

In Figure 5 I have illustrated the use of two guide posts 5 at each endof the pattern plate so that four guide posts are employed, insteadof'two as in the preceding are provided andeach -of the shafts" 17carries two pinions 18 (of which only two are shown in Fig. 5), thepinions on one shaft meshing with the racks 6 of one set of guide postsand the set of pinions on the other shaft meshing with the racks 6 onthe other set of guide posts. At each end of the pattern plate, thepinions 18 mesh with each other. In certain situations it is desirableto use the arrangement shown in F ig. 5.

To prevent the guide posts from dropping out, they are provided withheads 23.

The trunnions on the flask 3 appear at 2 1.

The flask 3 is first set on the pattern plate 1, the dowel ends ortenons 12 passing through the holes in the flange of the flask as shownin Fig. 1, and the mold is rammed as, for instance, by a jolt machineshown conventionally at 1.

Eifter the mold has been suitably rammed, he ordinary clamps areemployed to clamp '16 *ask and pattern plate together. Suittble means isnow employed to lift the pat ern plate and flask from the rammingmachine and to roll them over as a unit. For that purpose, the trunnions22 are inserted in the openings 20 and the lifting and suspending meansis attached to said trunnions.

The lifting and suspending means is next manipulated to set the molddown, the flask being underneath, as shown in Fig. 3. The clamps thatsecure the flask and pattern plate together are now removed. Thetrunnions 22 are then removed and placed in the sockets 21.

The keys or wedges 14L are now driven through the slots 13 to rigidlyhold the guide posts 5 in position as shown in Figs.

an a 3 and a, if said keys havenot been previ-' ously driven in saidslots. It .will be understood that the keys 14 may be driven into theslots 13 at any previous time during the operation, even before theramming of the mold, if considered advisable.

The pattern is now drawn by applying to the trunnions 22 any suitableraising means and using said means to lift the pattern plate andpattern, drawing being thus effected merely by lifting the patternplate. The lifting movement is arrested when the heads 23 encountered.

After drawing has been effected in the manner shown in Fig. 3, the keys1% are knocked out and the pattern plate further elevated by meansapplied to the trunnions 22 when in the sockets 21, thus disengaging thetenons12 from the flask. The pattern plateis then rolled back to bringthe pattern in uppermost position, as shown in Fig. 1 whereupon theguide posts 5 drop down and the pattern plate is ready to receiveanother flask.

f the pattern plate is provided with only prevent the pattern plate-frorn tilting endwise. The hubs on the pattern plate, in

which the guide posts'slide, combined with the rigid attachment of theguide posts to the flask, prevent lateral tilting.

The gear pinions and racks insure the maintenance of alinement betweenthe pattern and flask during the drawing operation as the pinions atopposite ends of the pattern plate are of equal size, pitch and pitchdiameter.

I claim:

1. The combination with a pattern plate for molds, of means carriedthereby for connecting said pattern plate to a flask which permits thepattern plate to be shifted toward and away from the flask, and meanscarried by the pattern plate adapted to automatically maintain thepattern plate and flask in alinement when the pattern plate is shiftedto draw the pattern.

2. The combination with a pattern plate for molds, of guide postscarried thereby on which the pattern plate slides, said posts beingadapted to be rigidly secured to a flask, and coupled means movable onsaid guide posts which cooperate with the guide posts to maintainparallelism between the pattern plate and the top of the flask duringthe drawing operation. 1

3. A pattern plate for molds which has an attachment self-containedtherewith, comprising guide posts on which the pattern plate slides,said posts being adapted to en gage the flask, and coupled wheelscarried by the pattern plate which engage with the guide posts wherebyparallelism is main tained between the pattern plate and the upper faceof the flask during the drawing operation.

4. A pattern plate for molds which has an attachment self-containedtherewith, comprising guide posts having racks on which the patternplate slides, said posts being adapted to engage the flask, and coupledpinions carried by the pattern plate and meshing with the racks on theguide posts, said pinions, racks, and guide posts insuring parallelismof the pattern plate and upper face of the flask during the drawingoperation.

5. The combination with a flask and pattern plate, of guide posts forthe pattern plate which have racks, and coupled pinions carried by thepattern plate and meshing with said racks.

6. The combination with a flask, of guide posts detachably connectedthereto which are provided with racks, a pattern plate, and coupledpinions carried by the pattern plate which mesh with said racks.

7. The combinationwith a pattern plate for a mold, of guide posts whichare slid-' tenons adapted to pass through the open ings, means forsecuring the dowels or tenons to the flask, and a pattern plate slidablon said guide posts. I

10. The combination with a flask having openings, of a pattern plate,guide posts provided with self-adjusting abutments adapted to bear onthe flask and having dowels or tenons. adapted to pass through theopenings, means for securing the dowels or tenons to the flask, apattern. plate slidable on said guide posts, said guide posts beingprovided with racks and bodily carried by the pattern plate, and coupledpinions carried by the pattern plate which mesh with racks on the guideposts.

11. A pattern plate for molds which is provided with shiftabletrunnions.

12. A. pattern plate for molds having removable trunnions adapted to beaflixed to the pattern plate atdiflerent points.

18. A pattern plate for molds which is provided with a plurality ofsockets, and removable trunnions adapted to be inserted in differentones of said sockets.

In testimony whereof I aiflx my signature.

WILLIAM G. NORCROSS.

